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From: Sean Christopherson <seanjc@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] KVM: x86/mmu: Use yield-safe TDP MMU root iter in MMU notifier unmapping
Date: Sat, 20 Nov 2021 01:50:08 +0000	[thread overview]
Message-ID: <20211120015008.3780032-1-seanjc@google.com> (raw)

Use the yield-safe variant of the TDP MMU iterator when handling an
unmapping event from the MMU notifier, as most occurences of the event
allow yielding.

Fixes: e1eed5847b09 ("KVM: x86/mmu: Allow yielding during MMU notifier unmap/zap, if possible")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 arch/x86/kvm/mmu/tdp_mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
index 377a96718a2e..a29ebff1cfa0 100644
--- a/arch/x86/kvm/mmu/tdp_mmu.c
+++ b/arch/x86/kvm/mmu/tdp_mmu.c
@@ -1031,7 +1031,7 @@ bool kvm_tdp_mmu_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range,
 {
 	struct kvm_mmu_page *root;
 
-	for_each_tdp_mmu_root(kvm, root, range->slot->as_id)
+	for_each_tdp_mmu_root_yield_safe(kvm, root, range->slot->as_id, false)
 		flush |= zap_gfn_range(kvm, root, range->start, range->end,
 				       range->may_block, flush, false);
 
-- 
2.34.0.rc2.393.gf8c9666880-goog


             reply	other threads:[~2021-11-20  1:50 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-20  1:50 Sean Christopherson [this message]
2021-11-21  9:44 ` Lai Jiangshan
2021-11-26 16:45 ` Paolo Bonzini

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